EP0241894B1 - Yarn testing method and apparatus - Google Patents

Yarn testing method and apparatus Download PDF

Info

Publication number
EP0241894B1
EP0241894B1 EP87105440A EP87105440A EP0241894B1 EP 0241894 B1 EP0241894 B1 EP 0241894B1 EP 87105440 A EP87105440 A EP 87105440A EP 87105440 A EP87105440 A EP 87105440A EP 0241894 B1 EP0241894 B1 EP 0241894B1
Authority
EP
European Patent Office
Prior art keywords
yarn
yam
clamps
sensor
discs
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87105440A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0241894A3 (en
EP0241894A2 (en
Inventor
Jaromir Cizek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uster Technologies AG
Original Assignee
Zellweger Uster AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zellweger Uster AG filed Critical Zellweger Uster AG
Publication of EP0241894A2 publication Critical patent/EP0241894A2/en
Publication of EP0241894A3 publication Critical patent/EP0241894A3/en
Application granted granted Critical
Publication of EP0241894B1 publication Critical patent/EP0241894B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
    • G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0278—Thin specimens
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/026—Specifications of the specimen
    • G01N2203/0262—Shape of the specimen
    • G01N2203/0278—Thin specimens
    • G01N2203/028—One dimensional, e.g. filaments, wires, ropes or cables
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/36—Textiles
    • G01N33/365—Filiform textiles, e.g. yarns

Definitions

  • the present invention relates to a method for determining tensile properties of yarns by feeding a predetermined length of yarn discontinuously from a holder to a pair of spaced clamps, clamping the length of yam by the said clamps, causing one or both clamps to move relative to the other proges- sively to tension the yarn, and measuring the yarn tension or the elongation of the length of yarn during the tensioning process.
  • the method according to the invention will in particular be suitable for determining the suitability of yarns for weaving and knitting purposes. It is however envisaged that the term “yarn” herein includes any alongated fibre, strand, string, sliver or the like.
  • the method enables not only determining the tensile properties like the tension and/or the tensile strength of yarns but can also give a statistical indication of the number of weak points per length unit of a yarn.
  • the present invention seeks to avoid this disadvantage by providing a method for determining tensile properties of yams which enables a higher processing velocity than known methods.
  • the method according to the invention is characterised in drawing off the yam continuously from the holder, providing clamps which comprise each a rotable disc, clamping the yam to the discs over an arc portion of the periphery thereof which is less than the length of the periphery so that the yarn is intermittently clamped and released, and guiding the yam over a sensor for measuring the tension or the elongation of the yam, said sensor being arranged between the clamps.
  • the invention further relates to an apparatus for carrying out the method according to the invention.
  • This apparatus is characterised by a yam storage device arranged between a yam holder and clamps, by holding means for clamping the yarn to an arc portion of the periphery of discs, and by a yam conduit arranged between the clamps and comprising a sensor for measuring the tension or the elongation of the yam.
  • the apparatus in accordance with the invention for testing yarn 10 comprises a yam pathway which starts with a spool 12 or other suitable reservoir for yam, and which terminates in an outlet 16 which is coupled to a suction device, not shown.
  • the yam 10 is continually fed from the spool 12 by means of a pair of rollers 11 and during a feed cycle, a predeterminded length of yam which has passed through the rollers 11, is sucked along the yam pathway to be tested during a testing cycle which is described in more detail below.
  • an eccentric device is provided to guide the yam from a position remote from the feed rollers 11 towards a position which proximates the rollers 11 and thus serves to take up slack during the feed cycle.
  • the eccentric comprises a plate 13 which has an eccentric aperture 13a therein which defines an inlet to the suction pathway 13b for the yam.
  • the yam pathway 13b leads to a pair of spaced clamps in the form of pulleys 17 and 18 over which belts 19 and 20 respectively run.
  • the belts 19 and 20 are of the endless variety and extend between the pulleys 17 and 18 and spaced idlers 21 and 22 respectively.
  • yam is fed into the nip defined by the belts 19,20 and the pulleys 17, 18, and thus clamped.
  • the yam is tensioned until breakage occurs.
  • the tension in the yam 10 is measured by a force transducer 23 which is located in the yarn pathway.
  • the yam pathway follows a half-wave curve with the yam passing around a roller 24a over the transducer 23 and back around a roller 24b.
  • the elongation in the yarn 10 will also be measured by means of a slotted pulse generator 40, Figure 4, 5, which is coupled in the drive train for the apparatus. By counting the number of pulses given by the generator 40 during the period when the force measured by the transducer 23 is greater than zero, the elongation of the yarn can be determined.
  • the clamping and tensioning pulleys 17 and 18 are located in spaced housings 14 and 15, which define an outlet 14a and an inlet 15a respectively, the outlet 14a and inlet 15a being coupled in the pathway leading to and from force transducer zone, Fig. 1.
  • a disc 27 which defines an axial portion 27b which extends from the portion 13b of the yam pathway described above. From the axial portion 27b the yam pathway extends radially along a cut-out 27a in the disc 27 to beyond the periphery of a pulley 17.
  • the latter aligns with apertures 26a in a pair of plate elements 26 which flank the pulley 17 and rotate in conjunction therewith.
  • a horse-shoe shaped disc 25 fits between the plates 26 and defines a cut-out 25a therein so that the plate 25 seals off the apertures 26a in all angular positions of the plates 26 except when the apertures 26a align with the cut-out 25a.
  • the cut-out 25a corresponds with a 180 ° portion of the pulley 17 which is not in engagement with the belt 19.
  • the feeding and suction cycle thus commences when the pulley 17 and belt 19 release a length of yam, and the cycle ceases, when the belt and pulley again clamp a length of yarn at the onset of a tensioning cycle.
  • suction at the outlet 16 will be continuous, with suitable seals such as that shown at 26b on the plates 26 being provided effectively to shut-off airflow during the tensioning cycle.
  • the drive train of the apparatus is shown more clearly in Figure 4 and Figure 5, and comprises a belt 30 driven by a suitable drive motor, not shown.
  • the belt 30 drives a shaft 41 via a pulley 41 a, with the shaft 41 driving the pulse generator 40, feedrollers 11, and a pulley 41b.
  • the latter pulley in turn drives via a belt 31 a pulley 32 which drives a belt 33 which in turn drives pulleys 34 for appropriate rotation of the clamping pulleys 17 and 18.
  • the apparatus provides a continuous yam feed with extremely rapid threading and tensioning of the yam to breakage.
  • yam can be tested at a rapid rate to provide an indication of the level and frequency of weak place in the yam and therefore the expected weaving performance of the yam.

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
EP87105440A 1986-04-15 1987-04-13 Yarn testing method and apparatus Expired - Lifetime EP0241894B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA862796 1986-04-15
ZA862796 1986-04-15

Publications (3)

Publication Number Publication Date
EP0241894A2 EP0241894A2 (en) 1987-10-21
EP0241894A3 EP0241894A3 (en) 1988-06-01
EP0241894B1 true EP0241894B1 (en) 1990-08-16

Family

ID=60320552

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87105440A Expired - Lifetime EP0241894B1 (en) 1986-04-15 1987-04-13 Yarn testing method and apparatus

Country Status (7)

Country Link
US (1) US4825702A (enrdf_load_stackoverflow)
EP (1) EP0241894B1 (enrdf_load_stackoverflow)
JP (1) JP2552131B2 (enrdf_load_stackoverflow)
KR (1) KR970003274B1 (enrdf_load_stackoverflow)
CH (1) CH671633A5 (enrdf_load_stackoverflow)
DE (1) DE3764295D1 (enrdf_load_stackoverflow)
ES (1) ES2016942B3 (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111380747A (zh) * 2020-05-12 2020-07-07 兰州理工大学 一种土遗址锚固拉拔试验恒力加载系统及其使用方法

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH677282A5 (enrdf_load_stackoverflow) * 1988-08-03 1991-04-30 Peyer Ag Siegfried
ES2108011T3 (es) * 1989-01-04 1997-12-16 Zellweger Uster Inc Metodo para el ensayo de fibras.
CH678764A5 (enrdf_load_stackoverflow) * 1989-06-20 1991-10-31 Zellweger Uster Ag
DE3942111C2 (de) * 1989-12-20 1994-04-07 Stein Herbert Textechno Spannvorrichtung für hochfeste faden- oder bandförmige Materialien
US5076104A (en) * 1990-11-01 1991-12-31 Corning Incorporated Method for measuring actual load at failure of optical fiber
CH687540A5 (de) * 1992-02-07 1996-12-31 Staeubli Ag Verfahren und Vorrichtung zur Bestimmung von Festigkeitseigenschaften der Kettfaeden einer Webkette.
IL102558A (en) * 1992-07-20 1996-07-23 Israel State Measurement of filament drift
JPH08254504A (ja) * 1994-11-29 1996-10-01 Zellweger Luwa Ag 伸長された物体の特性を記録するための方法と装置
DE19635695A1 (de) * 1996-09-03 1998-03-05 Schlafhorst & Co W Fadenführungseinrichtung
DE59803173D1 (de) * 1997-09-02 2002-04-04 Chemiefaser Lenzing Ag Verfahren zur Bestimmung der Festigkeitseigenschaften von langgestrecktem, textilem Prüfgut und Vorrichtung zur Durchführung des Verfahrens
DE60143426D1 (de) * 2000-03-20 2010-12-23 Corning Inc Winde zum prüfen von optischen fasern
GB0517659D0 (en) * 2005-08-31 2005-10-05 Watkins Penelope A Tensile tester
CN105866391B (zh) * 2015-01-19 2017-06-27 辽东学院 新型绷布器
ITUB20154807A1 (it) * 2015-10-20 2017-04-20 Mesdan Spa Dispositivo di misurazione per la misurazione di caratteristiche dinamometriche di campioni tessili allungati del tipo di filati, fili, nastri e simili
ZA201704815B (en) * 2016-09-05 2019-05-29 Rosendahl Nextrom Gmbh Apparatus and method for tensile testing

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA775849A (en) * 1968-01-16 Du Pont Of Canada Limited Tension transducer
US2533332A (en) * 1945-04-11 1950-12-12 Celanese Corp Filament tester
DE1124268B (de) * 1958-10-15 1962-02-22 Marcel Antoine Victor Defraine Vorrichtung zur Feststellung der Reissdehnung der Einzelfaeden von Fadenverbaenden
US3049916A (en) * 1959-03-27 1962-08-21 Louis I Weiner Pocket-size tester for yarn, threads and the like
BE632712A (enrdf_load_stackoverflow) * 1962-05-22
US3287964A (en) * 1964-01-10 1966-11-29 Sylvania Electric Prod Apparatus for testing filamentary material
US3533284A (en) * 1969-06-09 1970-10-13 North American Rockwell Micro-elongation tester
DE2105302C3 (de) * 1970-02-12 1975-06-26 E.P.M. International, Levallois- Perret (Frankreich) Heizdecke für das beschleunigte Abbinden von Beton
AT347150B (de) * 1973-04-06 1978-12-11 Chemiefaser Lenzing Ag Verfahren zur bestimmung der zugfestigkeit von einzelnen fasern, insbesondere chemiefasern
US3885417A (en) * 1973-06-28 1975-05-27 Gen Electric Fluidic gauging sensor head having a gas bearing material
US3992936A (en) * 1975-06-23 1976-11-23 Wesco Industries Corporation Yarn measuring instrument
HU174987B (hu) * 1976-10-12 1980-04-28 Textilipari Kutato Intezet Oborudovanie k bystromu i massovomu ispytaniju na razryv volokon
US4100796A (en) * 1977-10-27 1978-07-18 Akzona Incorporated Test apparatus
JPS5480181A (en) * 1977-12-08 1979-06-26 Unitika Ltd Dynamic high elongation measuring instrument
US4148218A (en) * 1978-04-17 1979-04-10 Corning Glass Works Apparatus for applying tensile stress to fiber
US4245512A (en) * 1979-06-18 1981-01-20 Levi Strauss & Co. Fabric stretch testing device
CH639764A5 (de) 1979-09-21 1983-11-30 Zellweger Uster Ag Verfahren zur einstellung einer gegebenen vorspannung an einem faden in einem pruefgeraet, insbesondere einem reissfestigkeitspruefgeraet.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111380747A (zh) * 2020-05-12 2020-07-07 兰州理工大学 一种土遗址锚固拉拔试验恒力加载系统及其使用方法

Also Published As

Publication number Publication date
DE3764295D1 (de) 1990-09-20
JP2552131B2 (ja) 1996-11-06
KR870010393A (ko) 1987-11-30
US4825702A (en) 1989-05-02
CH671633A5 (enrdf_load_stackoverflow) 1989-09-15
JPS62255847A (ja) 1987-11-07
ES2016942B3 (es) 1990-12-16
EP0241894A3 (en) 1988-06-01
KR970003274B1 (ko) 1997-03-17
EP0241894A2 (en) 1987-10-21

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